Improvement in steam-heaters



G. B. H i E G I NS.`

Steam Heaters.

Patented May 13, 1873.

UNITED STATES PATENT OEETGE.

GEORGE B. RrGGINs, OE NEW YORK, N. Y.

IMPROVEMENT IN STEAM-HEATERS.

Specification forming part of Letters Patent No. 138,936, dated May 13,1873 application filed March 12, 1873.

To all whom it may concern:

Be it known that I, GEORGE B. RIGGINs, of the city, county, and State ofNewYork, have invented a new and Improved Steam- Heating Apparatus; andI do hereby declare the following to be a full, clear, and exactdescription thereof, which will enable those skilled in the art to makeand use the same, reference being had to the accompanying drawingforming part of this specification, in which drawing- Figure 1represents a sectional elevation of my apparatus. Fig. 2 is a detachedsection of part of the connecting-pipe between the supply-tank and thegenerating-coil in a larger scale than the previous figure.

Similar letters indicate corresponding parts.

This invention relates to a certain improvement on a heating apparatusof that class in which one or more generating-coils are used, which aresupplied with water from a supplytank, situated Outside the furnace thatincloses the generating-coils. My improvement consists in thearrangement of a compound nozzle forming part of the connection betweenthe supply-tank and each of the generating coils, in such a manner thatby said nozzle the liow ofthe water from the tank to the coils` ispromoted and that said coils a-re furnished with a regular and uniformsupply of water.

In the drawing, the letter A designates a furnace which contains one ormore generating-coils, B B, so that said coils are exposed to the directaction of the lire in the furnace. The lower ends of the coils B Bconnect by pipes a a with a supply-tank C, and said pipes are providedwith check-valves b b', to prevent the steam from passing through theminto the supply-tank. The upper ends of the coils connect with apipe, D,which passes transversely through the furnace A and connects with one ormore heating-coils E. From the tail ends of these heating-coils extendpipes F to the supply-tank C, so that the water which results from thecondensation of the steam in the heating coil or coils, is carried backinto the supply-tank.

This tank is supplied with water by means of a pipe, Gr, and it is soplaced that when the same is filled to the desired level the Water willflow into the generating-coils B B and ll the same up to the requireddegree, provided the pressure on both sides is the same. But if thegenerating-coils are heated and the water contained therein is convertedinto steam, the back pressure of this steam on the check-valves b b'keeps these valves closed, and the supply of Water from the tank to thecoils stops, unless some means are devised to overcome this difficulty.

The device which I have invented for the purpose of effectin g a uniformsupply of water from the tank C to the generating-coils, while thesecoils are in operation, consists of a compound nozzle, H, an enlargedsection of which is shown in Fig. 2 of the drawing. zle connects at oneend by means of an elbow, c, with its generating-coil, while its otherend is secured to the pipes c or c leading from the supply-tank C to thegenerating-coils. My compound nozzle is constructed of three pipes,

d e f, one within the other, the inner pipe d.

being in line with and about of the same size as the pipe a or a leadingto the tank (l, while the pipes e and f are of larger diameter so as toform annular spaces g h, one between the pipes d and c and anotherbetween the pipes e and f. The front part of my nozzle is made to extendinto the furnace A, while its rear part is situated outside of thefurnace, and at the beginning of the operation the pipes d, c, and f arelled up with water. When the re in the furnace is started, the water inthe generating-coils is gradually evaporated, and by the peculiarcombination of the three pipes l e f of my compound nozzle a suction isproduced in the inner pipe d, and the water from the supply-tank isenabled to ilow into the generating-coils without interruption.

What I claim as new and desire to secure by Letters Patent is Thecombination of acompound nozzle, H, with a supply-tank, C, and agenerating-coil, B, substantially in the manner and for the purposeherein shown and described.

GEO. B. RIGGINS.

Witnesses:

W. HAUEE, E. F. KASTENHUEER.

This noz-

